Pan-Arctic soil element availability estimations

Arctic soils store large amounts of organic carbon and other elements. Here, we analyzed amorphous silica (ASi), silicon (Si), calcium (Ca), iron (Fe), phosphorus (P), and aluminum (Al) availability from 574 soil samples from around the Arctic region. We summarized these data in pan-Arctic maps of ASi, Si, Ca, Fe, P, and Al concentrations focusing on the top 100 cm of Arctic soil. Furthermore, we provide values for element availability for the organic and the mineral layer of the seasonally thawing active layer as well as for the uppermost permafrost layer. We show large differences in ASi, Si, Ca, Fe, P, and Al availability between different lithologies and Arctic regions. Our provided spatially explicit data on differences in the availability of elements between the different lithological classes and regions now and in the future will improve Arctic models for estimating current and future carbon and nutrient feedbacks under climate change.

北极土壤储存着大量的有机碳及其他元素。本研究分析了来自北极地区周边的574个土壤样本中的非晶态二氧化硅（ASi）、硅（Si）、钙（Ca）、铁（Fe）、磷（P）和铝（Al）的可用性。我们将这些数据总结成全北极区域的ASi、Si、Ca、Fe、P和Al浓度图，聚焦于北极土壤表层前100厘米。此外，我们还提供了有机层和季节性融化活跃层矿物层以及最顶层永冻层的元素可用性数值。我们观察到不同岩性和北极地区在ASi、Si、Ca、Fe、P和Al的可用性方面存在显著差异。我们所提供的关于不同岩性类别和地区当前及未来元素可用性差异的空间解析数据，将有助于提升北极模型在气候变化影响下对当前及未来碳和营养反馈的估算能力。